howland



W. H. HOWLAND.

Ore Amalgamator.

Nd. 25,933. Pa tehted Oct. 25, 1859.

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' Z7276 WI I UNITED STATES PATENT OFFICE.

' W. H. HOWLAND, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR TO HIMSELF ANDJOHN O.

HANSOOM, OF SAME PLACE.

AMALGAMATOR.

Specification of Lett ers l Patent No. 25,933, dated October 25, 1859.

T 0 aZZ whom it may concern:

Be it known that I, \V. H. HowLANn, of San Francisco, in the county ofSan Francisco and State of California, have invented a new and ImprovedMachine for Pulverizing Gold-Bearing Quartz and Amalgamating the GoldTherein Contained; and I do hereby declare that the following is a full,clear, and exact description of the same, reference being had to theannexed drawing, making a part of this specification, said drawing beinga vertical central sect-ion of my invention.

The object of this invention is to re-grind the tailings of an ordinarystamping quartz mill so that the contained gold and quick-silver may bebrought in contact and all the gold amalgamated and saved. In using theand quick silver is lost, the great divisibility of the said substancesand a lack of proper union assisted by the presence of sulfate of iron,favoring their escape.

The within described invention consists in the employment or use of aconical grinder in connection with a horizontal oscillating dishprovided with annular chambers, the whole being arranged as hereinafterdescribed, whereby the desired object is attained as hereinafterdescribed.

To enable those skilled in the art to fully understand and construct myinvention I will proceed to describe it.

A, represents a framing formed of two side pieces a, a, a bottom crosspiece 6, and a top crosspiece or yoke c, the form of which is shownclearly in the drawing.

B, is a vertical shaft which is placed in the framing A, the lower endof said shaft being stepped at (Z, and its upper end having its bearingin the yoke c.

C, is a horizontal shaft placed in the upper part of the framing, saidshaft having a driving pulley (Z, on its outer and a bevel wheel 6, onits inner end. An eccentric f, is also placed on said shaft. On theupper part of the shaft B, a bevel pinion g, is secured into which thewheel 6, gears, and on' the shaft B, a collar or sleeve D, is placedloosely, said collar or sleeve having a hopper E; and hollow cone F,attached to it,

the inner side of cone F, forming one of the grinding surfaces of themill.

To the shaft B, a conical grinder G, is attached, said grinder fittingwithin the hostamping quartz mill much gold low cone F, as plainly shownin the drawmg. On the collar or sleeve D, near its upper end there is afianch h, and this flanch is directly over an annular plate 2', throughwhich the collar or sleeve passes. The plate Z, is formed in a bar j,the ends of which are fitted on pendent screw rods 70, 70, attached tothe yoke 0, the bar j, resting on nuts Z, Z. On the upper part of thecollar or sleeve D, a bevel pinion m, is placed loosely and fittedthereto by a feather and groove. This pinion m, rests on a bar n, theends of which are fitted on the pendent screw rods 70, 7c, and aresupported by nuts 0, 0. On the pintle which formsthe step (Z, of theshaft B, a circular dish G, is placed loosely. This dish has a series ofconcentric annular chambers 10, p, p, formed on its upper surface, thechambers being successively lower, one a trifle more so than the innerone adjoining it, as shown clearly in the drawing. To the under side ofthe dish h, G, a segment rack g, is attached, and into this rack apinion 1', gears, said pinion being on a shaft 8, which has a crankpulley t, on its outer end. The crank pulley t, has a connecting rod 10,attached, the upper end of said rod being secured to the eccentric f, bya strap '0.

The operation is as follows :The tailings or pulp is received from thestamping machine, the pulp passing into the hopper E, and the pulp isground by the action of the cones F, G, which rotate in oppositedirections, the pulp being ground as fine as desired by adjusting thecone F, by means of the nuts Z. The ground pulp passes from the conesinto the first compartment 79, and

from thence into the second compartment 79, and from p, it passes into29, the worthless portions being conveyed from the chamber p, by a spoutattached to the dish. The dish G, is oscillated by means of theeccentric f, rod a, shaft 8, and rack and pinion g, a". The pulp inconsequence of being reground or reduced to a more minute degree ofsubdivision by means of the grinding cones and also in consequence ofhaving its part-s by means of the grinding and the shake motion in dishG, well mixed or incorporated with each other, the quick-silver will bebrought in contact with the gold and the latter amalgamated andthoroughly separated from the foreign substances of the pulp.

I am aware that conical grinding mills tions, with a horizontallyoscillating chamhave been long used and arranged in various bered dishG, substantially as and for the 10 ways and I therefore do not claimsuch depurposes herein shown and described. vice when separatelyconsidered but 5 I do claim as new and desire to secure by HOWLAND'Letters Patent- Witnesses:

The combination of a pair of grinding E. T. KING, cones F, G, revolvingin different direc- G. T. BOULDEN. p v i

